The tropical climate of the island of Koh Samui stays relatively dry throughout the year and the short downpours occur mainly at night. The month of August has around 16 days of rain and brings 119mm of precipitation. The average temperatures, which are warm without being unbearable, fluctuate between 23°C at night and 33°C during the day. In the Gulf of Thailand the water temperature is at around 28°C but the number of hours of sunshine in the month of August is just 5 hours per day. As such, the weather comfort index score for Koh Samui in the month of August only reaches an average 49/100.

The weather prediction service in Koh Samui is based on a calculation which takes into account historic data from the last 10 years, as well as predictions based on certain criteria such as air temperature, humidity, water temperature, wind speed and sunshine.

Prepare your things now for your stay by taking a look at the weather predictions for Koh Samui.

Temperature

Bad weather

Sunbathing

Swimming

Wind

Humidity

The weather is rated on a scale from 0 to 100, with the worst weather conditions ranging between 0 and 19 and the best ranging above 79.The overall weather comfort index is:

Thailand: Seven-day weather forecast

Take a look at the seven-day weather forecast for the principal cities in Thailand. For each destination, Easyvoyage's weather tool gives you temperature and rainfall indicators, along with wind force and direction and sunrise/sunset times. Prepare your holidays using our weather forecasts or organise your activities thanks to the weather comfort index for Thailand. Whether you're getting ready to go or already on holiday, it's never been simpler to keep an eye on the weather than with Easyvoyage!